1. maths

    A chemical engineer designed a 625 ft long tailings channel to have a rhombus cross-section that is 9.5 ft deep, with walls sloping at an acute angle of 44„a. A contractor placed a bid to excavate the canal at $195/cubic yard plus 20% profit. What was
  2. Geometry

    An engineer designed a 620 ft long water canal to drain a rainwater detention pond. It is to have a trapezoid cross-section that is 8 ft deep, 15 ft across the bottom, with walls sloping outward at an angle of 40. (a)Calculate the volume of earth
  3. physics

    TV-reception antennas for VHF (channels 2 through 13) are constructed with cross wires supported at their centers, as shown in Figure 23.24. The ideal length for the cross wires is one-half the wavelength to be received, with the more expensive antennas
  4. spc

    a long strip of sheet metal 12 inches wide is to be formed into an open gutter with a rectangular cross-section as shown. what is the maximum possible area of the cross-section?
  5. calculus

    s=-4.9t²+245t+14.7 s=-4.9(t²-245/4.9t)+14.7 s=-4.9(t²-50t)+14.7 s=-4.9(t²-50+625-625)+14.7 s=-4.9(t²-50+625)+(-4.9)(-625)+14.7 s=-4.9(t-25)²+30625.5+14.17 s=-4.9(t-25)²+3077.2 as you can see on the process of the problem on the part that
  6. Calculus (Cross Section) again

    A half of a pepperoni stick is 10 cm long. Assume that a cross section perpendicular to the axis of the pepperoni at a distance x from the end if a circle of radius rad(3x). What is the volume of the pepperoni
  7. BC Calculus

    Fluid is flowing in a tube that has a radius of 3 centimeters. Water is flowing through a circular cross section at a rate of (9-r^2) cm/s, where r is the distance from the center of the cross section. What is the total amount of water that flows through
  8. Integrals/Related Rates(?)/Volume

    Fluid is flowing in a tube that has a radius of 3 centimeters. Water is flowing through a circular cross section at a rate of (9-r^2) cm/s, where r is the distance from the center of the cross section. What is the total amount of water that flows through
  9. Maths

    The size of a parcel despatched through the post used to be limited by the fact that the sum of its length and girth (perimeter of the cross section) must not exceed 6 feet. What was the volume of the largest parcel of square cross- section which was
  10. Maths

    The size of a parcel despatched through the post used to be limited by the fact that the sum of its length and girth (perimeter of the cross section) must not exceed 6 feet. What was the volume of the largest parcel of square cross- section which was
  11. Calculus

    The size of a parcel despatched through the post used to be limited by the fact that the sum of its length and girth (perimeter of the cross section) must not exceed 6 feet. What was the volume of the largest parcel of square cross- section which was
  12. science

    water flows steadily through a horizontal pipe of non uniform cross section. if the pressure of water is 4*10^4 N/m^2 at a point where the velocity of flow is 2ms^-1 and cross section is 0.02 m^2 what is the pressure at a point where cross section reduces
  13. math

    a cross section of a basement is shaped like a trapaziod. it has an area of 37.4 square meters, one base is 6.4 meters and the other base is 12.3 meters long. what is the height of the cross section? is it 18.7 or 2? or am i wrong?
  14. math

    a cross section of a basement is shaped like a trapaziod. it has an area of 37.4 square meters, one base is 6.4 meters and the other base is 12.3 meters long. what is the height of the cross section? is it 18.7 or 2? or am i wrong?
  15. physics

    A liquid is under stream lined motion through a horizontal pipe of non uniform cross section of the volume rate of flow at cross section a is v the volume rate of flow at cross section a/2 is Ans:V
  16. PHYSICS!!!

    A liquid (ñ = 1.65 g/cm3) flows through a horizontal pipe of varying cross section as in the figure below. In the first section, the cross-sectional area is 10.0 cm2, the flow speed is 288 cm/s, and the pressure is 1.20 105 Pa. In the second section, the
  17. Geometry

    A cylinder is sliced such that the cross section is perpendicular to its bases. What is the shape of the cross section? A: trapezoid (I think it's this one) B: triangle C: Circle D: Rectangle
  18. physics

    Consider two straight bars of uniform cross section made of the same material. Bar 1 has an axial length of and a square cross section with side length . Bar 2 has an axial length of and a round cross section with diameter. When subjected to axial tension,
  19. math

    The Fred Hartman Bridge allows Texas State Road 146 to cross the Houston ship channel. The bridge is 0.237 mile long. How many feet long is the bridge?
  20. physics

    The diffusion rate for a solute is 4.0E-11 kg/s in a solvent-filled channel that has a cross-sectional area of 0.50 cm^2 and a length of 0.220 cm. What would be the diffusion rate m/t in a channel with a cross-sectional area of 0.30 cm^2 and a length of
  21. Please Help!!!!!!

    an engineer designs a satellite dish with a parabolic cross section. The dish is 15 ft wide at the opening and the focus is placed 4 ft from the vertex. find an equation of the parabola. I know how to work this problem, but how do I know that I use the
  22. Math, Please Help!!!

    an engineer designs a satellite dish with a parabolic cross section. The dish is 15 ft wide at the opening and the focus is placed 4 ft from the vertex. find an equation of the parabola. I know how to work this problem, but how do I know that I use the
  23. psuchics

    Reaction at support and internal axial force resultant Consider two straight bars of uniform cross section made of the same material. Bar 1 has an axial length 1m of and a square cross section 1mm with side length . Bar 2 has an axial length of 3 m and a
  24. Physic

    Reaction at support and internal axial force resultant Consider two straight bars of uniform cross section made of the same material. Bar 1 has an axial length 1m of and a square cross section 1mm with side length . Bar 2 has an axial length of 3 m and a
  25. Differential calculus

    A gutter with trapezoidal cross section is to be made from a long sheet of tin 8 in wide by turning up one third of its width on each side , what width a cross the top that will give a maximum capacity
  26. English

    I just need to know if zapping, channel surfing are synonyms, if subscribe is followed by to, and if propose could be followed the indirect object. I included a few more sentences I really don't know if they are possible. 1) I hate people zapping (channel
  27. PHYSICS !!!

    The diffusion rate for a solute is 4.0 10-11 kg/s in a solvent-filled channel that has a cross-sectional area of 0.50 cm2 and a length of 0.220 cm. What would be the diffusion rate m/t in a channel with a cross-sectional area of 0.30 cm2 and a length of
  28. Calculus

    A gutter with trapezoidal cross-section is to be made from a long sheet of stainless steel that is 30 cm wide by turning up one-fourth of the width on each side. What width across the top will give the maximum cross sectional area?
  29. Chemstry

    A 4.1089 g piece of aluminum wire with a circular cross section is 42.06 cm long and has density of 2.6989 g/cm3. What is the volume of the wire and the cross sectional area of the wire in cm2?
  30. maths

    A large canal will have a cross-section in the shape of an isosceles trapezoid. The top will be twice as wide as the bottom, and the depth will be 8.00 m. Because of the cost of the building materials, the bottom and two slopes sides are to measure 14.0 m
  31. communication

    A binary symmetric channel (BSC) with crossover probability p is shown in the figure below. Two BSCs with the same crossover probability are cascaded such that the output of channel-1 is fed as input to channel-2. The overall capacity of the equivalent
  32. Chem Help!!

    A standard 1.000kg- mass is to be cut from a bar of steel having an equilateral triangular cross section with sides equal to 3.00in. The density of the steel is 7.70g/cm^3. How many inches long must the section of bar be?
  33. Math

    A cylinder is to be made of circular cross-section with a specified volume. Prove that if the surface area is to be a minimum, then the height of the cylinder must be equal to the diameter of the cross-section of the cylinder. Maybe it's the wording, but I
  34. Math. HELP!

    A cylinder is to be made of circular cross-section with a specified volume. Prove that if the surface area is to be a minimum, then the height of the cylinder must be equal to the diameter of the cross-section of the cylinder. Maybe it's the wording, but I
  35. Math. HELP!

    A cylinder is to be made of circular cross-section with a specified volume. Prove that if the surface area is to be a minimum, then the height of the cylinder must be equal to the diameter of the cross-section of the cylinder. Maybe it's the wording, but I
  36. Math. HELP!

    A cylinder is to be made of circular cross-section with a specified volume. Prove that if the surface area is to be a minimum, then the height of the cylinder must be equal to the diameter of the cross-section of the cylinder. Maybe it's the wording, but I
  37. Math Wrod Problem

    1. A long strip of copper 8 inches wide is to be made into a rain gutter by turning up the sides to form a trough with a rectangular cross section. Find the dimentions of the cross-section if the carrying capacity of the trough is to be a maximum. 2. A
  38. math

    Bruce draws rings of rhombuses about a common centre point. All rhombuses have the same side length. Rhombuses in the first, or inner, ring are all identical. Each rhombus has a vertex at the centre and each of its sides that meet at the centre is shared
  39. math help please

    a plane intersects a square pyramid perpendicular to its base but not through a vertex.The plane forms a cross section what is the shape of the cross section a)trapezoid b)triangle c)square d)rectangle
  40. math

    a plane intersects a square pyramid perpendicular to its base but not through a vertex.The plane forms a cross section what is the shape of the cross section a)trapezoid b)triangle c)square d)rectangle
  41. math

    The area of a rhombus is 60cm^2. Given that one of its diagonals is 15 cm long, calculate the perimeter of the rhombus.
  42. maths

    the cross section of a canal is a trapezium in shape .if the canal is 10m wide at top ,6m wide at bottom & the area of the cross section is 72 sq m ,determine its depth
  43. Math

    Tangent of an acute angle of a rhombus is 3⁄4, whereas its side is 10 cm long. Find an area of the rhombus.
  44. Algebra-Trig help asap

    A rhombus has sides of 5 cm each and one diagonal is 6 cm long. Find the area of the rhombus.
  45. Math

    A piece of wire 64 cm long is bent to form a rhombus.What is the length of each side of the rhombus
  46. Trig-Algebra help asap

    A rhombus has sides of 5 cm and one diagonal is 6 cm long. Find the area of the rhombus.
  47. CALCULUS

    1. A rectangular package to be sent by a postal service can have a maximum combined length and girth (perimeter of a cross section) of 108 inches. Find the dimensions of the package of maximum volume that can be sent. (Assume the cross section is square.)
  48. Calc

    A rectangular package to be sent by a postal service can have a maximum combined length and girth (perimeter of a cross section) of 90 inches (see figure). Find the dimensions of the package of maximum volume that can be sent. (Assume the cross section is
  49. Physics

    Skydiver Joseph Kittinger, record for the longest jump, reaches a terminal speed of 60m/s with his arms and body fully extended. Then, he switches to a head first dive, reducing his cross section area by 80% (that is, his cross section area when head-first
  50. electronic

    A 1mm cross section of copper wire is isolated. The charge that flows through the cross section is Q t = 4t^2 + 5 How much current flows through the wire in 6 seconds?
  51. math

    Erika spent5/6 hr. on her computer visiting the History Channel and the Discovery Channel websites. She spent 12 minutes at the history channel website. What fraction of an hour did she spend at the discovery channel website?
  52. math help please

    a plane intersects a right rectangle prism perpendicular to its base .The plane forms cross section.What is the shape of the cross section? a)parallelogram,that is not a rectangle b)triangle,that is not equilateral c)trapezoid d)rectangle
  53. math

    If one tank has an 80 x 80cm cross section; the other has a 60 x 60cm cross section. if I pour 100 litres of oil into the larger tank, by how much will the level of the oil in the smaller tank rise?
  54. Careers

    I want to become a Construction engineer when I am older. In class I have to make a presentation about wanting to become a Construction Engineer, the only thing I can't find is how long you have to go to college to be able to do this work. Can you help me?
  55. Math

    The diagonal of a rhombus are 16cm nd 8cm long.find the measure of the side of a sq. Whose area is the same as that of the rhombus gve me ful sltn nd ans. 8m
  56. computer network

    Any experts in communications/information theory can help me on this? Consider a fiber optic communication channel with cross over probability of 10^-2 and a wireless mobile channel with erasure probability of 10^-2. Calculate the mutual information
  57. physics

    A liquid (ρ = 1.65 g/cm^3) flows through two horizontal sections of tubing joined end to end. In the first section the cross-sectional area is 10.0 cm^2, the flow speed is 245 cm/s, and the pressure is 1.20 105 Pa. In the second section the
  58. math

    the main trunk of a tree is in the shape of a cylinder. The distance around its cross section is 47.1cm and its height is 0.7m. What is the radius of the cross section? I know i have the height and circumference, would i divide the circumference by 4 to
  59. mathematics

    Please help me answer this question; 1.A metal gutter open at the tops and ends, is bent up from material 30 cm wide to form a rectangular cross section. a) If the base of the gutter is x cm wide, find the height of the gutter. b)Show that the area of the
  60. chemistry

    home / study / questions and answers / science / chemistry / a chemical engineer studying the properties of ... Question A chemical engineer studying the properties of fuels placed 1.760 g of a hydrocarbon in the bomb of a calorimeter and filled it with O2
  61. another physics question

    A liquid ( = 1.65 g/cm3) flows through two horizontal sections of tubing joined end to end. In the first section the cross-sectional area is 10.0 cm2, the flow speed is 275 cm/s, and the pressure is 1.20 105 Pa. In the second section the cross-sectional
  62. Physics

    A liquid (density = 1.65 g/cm^3) flows through two horizontal sections of tubing. In the first section the cross-sectional area is 10.0 cm^2, the flow speed is 275 cm/s, and the pressure is 1.20 x 10^5 Pa. This tubing then rises 50 cm to the second
  63. algebra 2

    An auditorium has a curved back wall. A horizontal cross section of the wall is in the shape of a parabola. The wall is 80 feet wide and the vertex of the parabolic cross section is 50 feet from the stage. Where in the auditorium should you sit for the
  64. algebra 2

    An auditorium has a curved back wall. A horizontal cross section of the wall is in the shape of a parabola. The wall is 80 feet wide and the vertex of the parabolic cross section is 50 feet from the stage. Where in the auditorium should you sit for the
  65. MATH

    Erika spent 5/6 hr on her computer visiting the history channel and the discovery channel websites. She spent 1/5 hr at the history channel website. How many hours did she spend at the discovery channel website? please help I have no idea where to begin
  66. science

    1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon d? 2. A stream channel is formed when water A. carves a very deep and wide channel into rock. B. carries minerals into the ocean. C. creates a depression,
  67. Maths calculus

    A rectangular box has a square cross-section and the sum of its length and the perimeter of this cross-section is 2 m. If the length of the box is x m, show that its volume V m^3 is given by V = [x(2-x)^2]/16. Hence find the maximum volume of the box.
  68. math

    Erika spent 5/6 hr on her computer visiting the history channel and the discovery channel websites. She spent 1/5 hr at the history channel website. How many hours did she spend at the discovery channel website? I came up with 19/30 hr. Am I correct?
  69. Math

    the larger angles of a rhombus are twice the smaller angle of the rhombus. if the shorter diagonal is 20, find the perimeter of the rhombus
  70. Math

    The larger angles of a rhombus are twice the smaller angle of the rhombus. If the shorter diagonal is 20, find the perimeter of the rhombus.
  71. EARTH SCIENCE

    1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon D? 4. A stream channel is formed when water A. carves a very deep and wide channel into rock. B. carries minerals into the ocean. C. creates a depression,
  72. EARTH SCIENCE

    1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon D? 2. A stream channel is formed when water A. carves a very deep and wide channel into rock. B. carries minerals into the ocean. C. creates a depression,
  73. geometry

    The two diagonals of a rhombus are 16 inches and 12 inches long. What is the perimeter of the rhombus? Round to the nearest inch, if necessary. a. 28 in b. 40 in c. 56 in d. 66 in
  74. math

    is a squre a rhombus? Yes. See this site for more information about a rhombus. http://id.mind.net/~zona/mmts/geometrySection/commonShapes/rhombus/rohmbus.html
  75. math/geometry

    An architect is designing a small A-frame cottage for a new resort area. A cross section of the cottage is an isosceles triangle with an area of 98 square feet. The front wall of the cottage must a accommodate a sliding door that is 6 feet wide and 8 feet
  76. Producing

    well ya i have a question I left my notes @ school I need to know what quality is most pleasing to the ear when recording audio. I'm using a half decent studio here were I have to following options 2 channel, 16 bit, 44100 Hz (CD Quality) 2 Channel, 16
  77. Physics

    Water is flowing in a pipe with a varying cross-section area, and at all points the water completely fills the pipe. At point 1 the cross-section area of the pipe is 0.080 m^2, and the magnitude of the fluid velocity is 2.50m/s. Calculate the volume of the
  78. economics

    Explain the relative advantages and disadvantages of time series and cross section studies for estimating cost fiction in the long run
  79. Algebra

    An engineer designs a satellite dish with a parabolic cross section. The dish is 10 ft wide at the​ opening, and the focus is placed 8 ft from the vertex. ​a) Position a coordinate system with the origin at the vertex and the​ x-axis on the​
  80. Algebra

    An engineer designs a satellite dish with a parabolic cross section. The dish is 14 ft wide at the​ opening, and the focus is placed 4 ft from the vertex. ​a) Position a coordinate system with the origin at the vertex and the​ x-axis on the​
  81. Math

    Which of the following statements is not always true? A. In a rhombus, the diagonals bisect opposite angles. B. In a rhombus, the diagonals are perpendicular. C. In a rhombus, the diagonals are congruent. D. In a rhombus, all four sides are congruent. I
  82. science/physics

    A heat-conducting rod consists of an aluminum section, 0.20 m long, and a copper section, long. Both sections have a cross-sectional area of The aluminum end of the rod is maintained at a temperature of , while the copper end is maintained at What is the
  83. Please help me!!!!!

    Some fishing line is made out of nylon with Y =3.0!109Pa and breaking stress 7.7!107 Pa . It is 5.0 m long, you are holding one end, and it hangs down vertically. (a) When a 3.0-kg fish is attached to the bottom end, the fishing line elongates by 1.0 cm.
  84. Art Question

    When children draw cross-sections of plants, they are: 1. intergrating science and art (Or) 2. intergrating mathematics and science Lordy. Surely you have some thinking on this, this question hardly stimulates the cerebral cortex. Did you mean integrating?
  85. Math Help Please

    The concentric circles, or growth rings, represent the cross-section of a tree with a diameter of 16 centimeters. The width of the outer tree ring measures 2 centimeters. What is the area in square centimeters of the outer ring of the cross-section of the
  86. geometry

    Which of the following statements is not always true? A. In a rhombus, the diagonals bisect opposite angles. B. In a rhombus, the diagonals are perpendicular. C. In a rhombus, the diagonals are congruent. D. In a rhombus, all four sides are congruent.
  87. Marketing2

    What type of channel conflict is likely to be caused by dual distribution, and what type of conflict can be reduced by direct distribution? Why? Channel conflicts: VERTICAL- occurs between different levels in a marketing channel; for example, between a
  88. Physics

    A long, straight wire with a circular cross section of radius R carries a current I. Assume that the current density is not constant across the cross section of the wire, but rather varies as J=αr, where α is a constant. A) By the requirement
  89. physics

    Freshwater (𝜌 = 1,020 kg/m3) is flowing in a horizontal pipe whose cross section widens from 9.0 cm2 to 13.0 cm2. The water speed at the wide section of the pipe is 1.25 m/s. What pressure difference (absolute value) is there between narrow and
  90. physics

    Freshwater (𝜌 = 1,020 kg/m3) is flowing in a horizontal pipe whose cross section widens from 9.0 cm2 to 13.0 cm2. The water speed at the wide section of the pipe is 1.25 m/s. What pressure difference (absolute value) is there between narrow and
  91. physics

    Problem:A long cylinder of diameter 2a has a charge per unit length, lambda, that is uniformly distributed down a very long wire. The cross section of the cylinder is not uniform, with a small hole drilled into it, which has a center at r = R and a
  92. math

    Write the number in scientific notation. 89,000,000,000 A 4-minute egg is cooked for what fraction of an hour? (1 hour = 60 min)? ADD 4 7/9+ 5 2/9 Erika spent 5/6 hr on her computer visiting the history channel and the discovery channel websites. She spent
  93. physics

    A thin, light wire 75.8cm long having a circular cross section 0.560mm in diameter has a 25.5kg weight attached to it, causing it to stretch by 1.12mm . what is the stress?
  94. Concrete on different temperature?

    if a section of concrete is poured for a road and the engineer leaves no gap between sections poured before and after the section in question , what will happen to concrete if the temperature varies from 0 C to 40 C ? Assume that the initial temperature of
  95. geometry

    a piece of rectangular sheet metal is 20 in. wide. It is made into a rain gutter by turning up the edges to form parallel sides. Let x represent the length of each of the parallel side. (a)give the restrictions on x (b)determine a fuction A that gives the
  96. maths

    in a rhombus ring pattern, each rhombus in the last ring has an angle of 20 dgerees and each rhombus in the second last ring has an angle of 60 degrees. What are the angles in each rhombus in the 3rd last ring? How many rhombuses are there in the first
  97. Math

    If a 32 ft rope is cut into two sections with one section 7 times as long as the other section, how long is the shorter piece?
  98. engineering

    During drilling of a deep oil well, the drill pipe got rigidly stuck. It was necessary to determine the depth at which the jamming occurred. The engineer ordered the pipe subjected to a large upwards tensile force, i.e., she pulled on it. As a result, the
  99. aeronautic

    A small wind tunnel is being built for studying insect flight. The first test section built has a uniform height h=0.1m and length ℓ=1m. During operation its walls are found to have boundary layers which effectively start at the inlet at x=0 (the BL
  100. math

    Car jacks are constructed like a rhombus. When used to raise a car, the rhombus is seen. If the sides of the rhombus are 13 inches, what is the maximum lenght of the shaft